How to Relight a Furnace Pilot Light: A Step-by-Step Guide
Relighting a furnace pilot light is a relatively simple process that can be done by following a few simple steps. If your furnace is not providing heat, it may be due to a blown pilot light, which is a common issue. In this article, we will guide you through the process of relighting a furnace pilot light.
What is a Pilot Light?
Before we dive into the process of relighting a furnace pilot light, let’s first understand what a pilot light is. A pilot light is a small flame that is used to ignite the main burner in a furnace. It is usually located at the base of the furnace and is designed to provide a steady flame that can be ignited by the thermostat to provide heat.
Why Does the Pilot Light Go Out?
There are several reasons why the pilot light may go out, including:
- Dirty or clogged pilot light orifice: The pilot light orifice is the small opening where the pilot flame emerges. If it is dirty or clogged, it can prevent the flame from burning properly, causing it to go out.
- Incorrect pilot light adjustment: If the pilot light is not adjusted correctly, it can cause the flame to go out.
- Low gas pressure: If the gas pressure is too low, it can cause the pilot flame to go out.
- Faulty thermocouple: The thermocouple is a sensor that detects the presence of a flame. If it is faulty, it can prevent the pilot light from igniting.
How to Relight a Furnace Pilot Light
Relighting a furnace pilot light is a relatively simple process that can be done by following these steps:
Contents
Step 1: Turn Off the Gas Supply
- Turn off the gas supply: Before you start relighting the pilot light, make sure to turn off the gas supply to the furnace. This is usually done by locating the gas shut-off valve and turning it clockwise until it stops.
- Verify the gas supply is off: Make sure to check the gas supply valve to ensure that it is completely turned off.
Step 2: Remove the Pilot Light Assembly
- Locate the pilot light assembly: The pilot light assembly is usually located at the base of the furnace. It may be held in place by screws or clips.
- Remove the pilot light assembly: Remove the pilot light assembly by unscrewing the screws or clips that hold it in place.
- Set the assembly aside: Set the pilot light assembly aside, taking care not to touch any of the electrical components.
Step 3: Clean the Pilot Light Orifice
- Remove any debris: Use a small brush or a cloth to remove any debris that may be blocking the pilot light orifice.
- Clean the orifice: Use a small, soft-bristled brush to clean the orifice. Make sure to remove any dirt, dust, or debris that may be blocking the flow of gas.
- Reassemble the orifice: Once the orifice is clean, reassemble it by screwing it back into place.
Step 4: Adjust the Pilot Light
- Locate the pilot light adjustment screw: The pilot light adjustment screw is usually located on the side of the pilot light assembly.
- Adjust the screw: Turn the screw clockwise to adjust the pilot light to the correct position.
- Verify the pilot light is adjusted correctly: Make sure to check the pilot light to ensure that it is adjusted correctly.
Step 5: Relight the Pilot Light
- Turn on the gas supply: Turn the gas supply valve counterclockwise to turn it back on.
- Press the pilot light button: Press the pilot light button to relight the pilot flame.
- Verify the pilot light is relit: Make sure to check the pilot light to ensure that it is relit.
Tips and Precautions
- Make sure to turn off the gas supply before attempting to relight the pilot light: This is an important safety precaution to prevent any accidents or explosions.
- Use a flashlight to see into the pilot light orifice: This can help you see any debris or dirt that may be blocking the orifice.
- Use a small, soft-bristled brush to clean the orifice: This can help you clean the orifice without damaging it.
- Verify the pilot light is adjusted correctly: Make sure to check the pilot light to ensure that it is adjusted correctly to prevent any issues with the furnace.
Conclusion
Relighting a furnace pilot light is a relatively simple process that can be done by following these steps. By turning off the gas supply, removing the pilot light assembly, cleaning the pilot light orifice, adjusting the pilot light, and relighting the pilot light, you can get your furnace up and running again. Remember to always follow safety precautions when working with gas appliances, and if you are not comfortable with the process, it is recommended to consult a professional.
